FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Ford/Mustang/S550 (2015-2023)/why does my Ford Mustang S550 (2015-2023) engine light come on after filling gas

why does my Ford Mustang S550 (2015-2023) engine light come on after filling gas

Ford Mustang S550 (2015-2023)

Severity: mediumDifficulty: medium2-4 hours
3 min read
584 words

Problem Statement

Learn how to diagnose and fix the check engine light issue after refueling in Ford Mustang S550 (2015-2023). Step-by-step guide with diagnostic procedures.

Component
Fuel System
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before performing any repairs.

Symptoms

  • •Check engine light illuminated
  • •Possible fuel odor around the vehicle
  • •Difficulty starting the engine after refueling
  • •Reduced fuel efficiency
  • •Engine running rough or stalling

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to identify specific issues related to the check engine light.
  2. 2Inspect the gas cap for proper sealing and any signs of damage or wear.
  3. 3Check for fuel leaks around the fuel filler neck and fuel lines.
  4. 4Examine the EVAP system components, including the purge valve and charcoal canister, for any faults or blockages.
  5. 5Test the fuel pressure to ensure it meets the manufacturer's specifications.
  6. 6Inspect the fuel tank for any signs of damage or contamination.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a level surface and the engine is cool.
  • Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Gas Cap

  • Sub-steps:
    1. Remove the gas cap and inspect it for cracks or wear.
    2. If damaged, replace it with a new one.
  • Tools Required: None specifically for this step.

3. Check and Repair EVAP System

  • Sub-steps:
    1. Locate the EVAP purge valve and disconnect the electrical connector.
    2. Remove the valve and test it with a multimeter to ensure it operates correctly.
    3. If faulty, replace the purge valve.
    4. Inspect the charcoal canister for cracks and replace if necessary.
  • Tools Required: Multimeter, socket set.

4. Inspect Fuel Lines and Filler Neck

  • Sub-steps:
    1. Visually inspect the fuel lines for any cracks or leaks.
    2. Check the fuel filler neck for rust or damage.
    3. Replace any damaged components as necessary.
  • Tools Required: Socket set, screwdriver.

5. Test Fuel Pressure

  • Sub-steps:
    1. Connect a fuel pressure gauge to the fuel rail.
    2. Turn the ignition to the "ON" position without starting the engine to check the pressure.
    3. Compare the reading to the manufacturer's specifications (typically around 30-50 PSI for most vehicles).
    4. If the pressure is low, consider replacing the fuel pump.
  • Tools Required: Fuel pressure gauge.

6. Reassemble and Test

  • Sub-steps:
    1. Reconnect all components and ensure everything is secure.
    2. Reconnect the negative battery terminal.
    3. Start the engine and monitor for any abnormal sounds or warning lights.
  • Tools Required: None specifically for this step.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Multimeter
  • Socket set
  • Fuel pressure gauge

Parts Required

  • Gas cap (if damaged)
  • EVAP purge valve (if faulty)
  • Charcoal canister (if damaged)

Additional Information

Component

Fuel System

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

4 items

Parts

3 items

Related Faults

Discover similar issues

  1. what does it mean if my Ford Mustang S550 (2015-2023) has uneven brake pad wear

    Learn how to diagnose and fix uneven brake pad wear on your Ford Mustang S550 (2015-2023). Step-by-step guide with symptoms, diagnostic steps, and rep...

    Component:Brakes
    Symptoms
    • •Noticeable difference in thickness between front or rear brake pads
    • •Increased noise during braking (squealing or grinding)
    • +{count} more
  2. why does my Ford Mustang S550 (2015-2023) make a hissing sound when I accelerate

    Learn how to diagnose and fix the hissing sound during acceleration in Ford Mustang S550 (2015-2023). Step-by-step guide with diagnostic procedures an...

    Component:Engine
    Symptoms
    • •Hissing sound during acceleration
    • •Possible decrease in engine performance
    • +{count} more
  3. how to fix P0420 code on my Ford Mustang S550 (2015-2023)

    P0420

    Learn how to diagnose and fix P0420 exhaust system issue in Ford Mustang S550 (2015-2023). Step-by-step guide with diagnostic procedures and repair in...

    Component:Exhaust System
    Symptoms
    • •Check engine light illuminated
    • •Decreased fuel efficiency
    • +{count} more
  4. how to diagnose suspension noise in my Ford Mustang S550 (2015-2023)

    Learn how to diagnose and fix suspension noise in Ford Mustang S550 (2015-2023). Step-by-step guide with symptoms, diagnostic steps, and repair instru...

    Component:Suspension
    Symptoms
    • •Clunking or banging noise when driving over bumps
    • •Creaking or squeaking sounds during turns
    • +{count} more
  5. why is my Ford Mustang S550 (2015-2023) brake light flashing

    Learn how to diagnose and fix a flashing brake light issue in a Ford Mustang S550 (2015-2023). Step-by-step guide with diagnostic procedures and repai...

    Component:Brakes
    Symptoms
    • •Flashing brake light on the dashboard
    • •Possible loss of brake assist
    • +{count} more
  6. how to reset ABS module on my Ford Mustang S550 (2015-2023)

    Learn how to reset the ABS module on your Ford Mustang S550 (2015-2023). Step-by-step guide with diagnostic procedures and safety tips.

    Component:Brakes
    Symptoms
    • •ABS warning light illuminated on the dashboard
    • •Traction control warning light on
    • +{count} more

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation